How do i update drivers on my 27in 2011 iMac?

I have a 2011 iMac 27in 3.4ghz processor with the upgraded graphics card to 2gb 6970m AMD. I'm looking to update the drivers so i can play a game (battelfield 3) however i have no idea how to do this. The AMD website and catalyst software is appalling. Could someone please provide me with some detailed instructions and a link?

I have a 2011 iMac 27in 3.4ghz processor with the upgraded graphics card to 2gb 6970m AMD. I'm looking to update the drivers so i can play a game (battelfield 3) however i have no idea how to do this. The AMD website and catalyst software is appalling. Could someone please provide me with some detailed instructions and a link?

Thank you so much.

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You can't update drivers in OS X but to do it in bootcamp with windows (not a virtual machine) download and run this program:

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